Sign frame



FIG. 1 is a perspective view of a sign frame showing my new design;

FIG. 2 is an enlarged detailed view of encircled area 2 in FIG. 1 ;

FIG. 3 is an enlarged detailed view of encircled area 3 in FIG. 1 ;

FIG. 4 is a front view thereof, the rear view being a mirror image thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an exploded perspective view thereof; and,

FIG. 10 is a perspective view of a sign frame in an unassembled position.

The broken lines in the drawings show environment and forms no part of the claimed design. 

CLAIM The ornamental design for a sign frame, as shown and described. 